53061691 has 4 divisors (see below), whose sum is σ = 53084152. Its totient is φ = 53039232.

The previous prime is 53061653. The next prime is 53061707. The reversal of 53061691 is 19616035.

53061691 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53061691 - 2⁷ = 53061563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53061601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7206 + ... + 12571.

It is an arithmetic number, because the mean of its divisors is an integer number (13271038).

Almost surely, 2^53061691 is an apocalyptic number.

53061691 is a deficient number, since it is larger than the sum of its proper divisors (22461).

53061691 is a wasteful number, since it uses less digits than its factorization.

53061691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22460.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 53061691 is about 7284.3456123388. The cubic root of 53061691 is about 375.7742604367.

The spelling of 53061691 in words is "fifty-three million, sixty-one thousand, six hundred ninety-one".